Effect of monomer-treated inorganic fillers on mechanical,rheological, and thermal properties of LLDPE nanocomposites |
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Authors: | Haydar U. Zaman Park Deuk Hun Ruhul A. Khan Keun-Byoung Yoon |
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Affiliation: | 1. Department of Polymer Science and Engineering , Kyungpook National University , Daegu , 702–701 , South Korea haydar_zaman@yahoo.com;3. Department of Polymer Science and Engineering , Kyungpook National University , Daegu , 702–701 , South Korea;4. Radiation and Polymer Chemistry Laboratory, Institute of Nuclear Science and Technology, Bangladesh Atomic Energy Commission , GPO Box No. 3787, Dhaka , 1000 , Bangladesh |
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Abstract: | This article discusses the role of nanoscale calcium carbonate (nCC) surface treatment in affecting the mechanical, rheological, and thermal properties of linear low-density polyethylene (LLDPE). The mechanical tests indicated that nCC could simultaneously reinforce and toughen LLDPE. In addition, the composite sample with methacrylic acid (MA)-treated nanoparticles shows further increased mechanical properties as compared to unmodified nanoparticles. In the presence of dicumyl peroxide (DCP), a small amount of MA could increase markedly the mechanical properties of LLDPE/nCC composites. The results of rheological property analysis indicated that the viscosity increased with increasing amount of the filler, especially at low shear rates, but showed a substantial reduction with increasing concentration of the reactive monomer. The thermal behavior of these materials is evaluated by differential scanning calorimetry and thermogravimetric analysis. The addition of a small amount of MA and DCP enhances the stabilization of the blends. |
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Keywords: | LLDPE methacrylic acid nano-CaCO3 DSC TGA mechanical properties |
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